News

  1. Space

    First shot of Mercury from orbit

    MESSENGER has radioed to Earth a new look at the first rock from the sun.

    By Ron Cowen
  2. Health & Medicine

    New brain cell growth restores function

    Regeneration in the hippocampus helps repair learning and memory after injury, mouse experiments suggest.

    By Tina Hesman Saey
  3. Humans

    Climate meddling dates back 8,000 years

    Cutting down trees put lots of carbon into the atmosphere long before the industrial revolution began.

    By Alexandra Witze
  4. Life

    DNA flaws can stack up as cancer grows

    Acute myeloid leukemia progresses by accumulating various mutations, according to an analysis of one man’s disease over time.